compact1, compact2, compact3
javax.crypto
Class KeyGeneratorSpi
- java.lang.Object
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- javax.crypto.KeyGeneratorSpi
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public abstract class KeyGeneratorSpi extends Object
This class defines the Service Provider Interface (SPI) for theKeyGeneratorclass. All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply the implementation of a key generator for a particular algorithm.- Since:
- 1.4
- See Also:
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SecretKey
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Constructor Summary
Constructors Constructor and Description KeyGeneratorSpi()
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description protected abstract SecretKeyengineGenerateKey()Generates a secret key.protected abstract voidengineInit(AlgorithmParameterSpec params, SecureRandom random)Initializes the key generator with the specified parameter set and a user-provided source of randomness.protected abstract voidengineInit(int keysize, SecureRandom random)Initializes this key generator for a certain keysize, using the given source of randomness.protected abstract voidengineInit(SecureRandom random)Initializes the key generator.
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Method Detail
engineInit
protected abstract void engineInit(SecureRandom random)
Initializes the key generator.- Parameters:
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random- the source of randomness for this generator
engineInit
protected abstract void engineInit(AlgorithmParameterSpec params, SecureRandom random) throws InvalidAlgorithmParameterException
Initializes the key generator with the specified parameter set and a user-provided source of randomness.- Parameters:
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params- the key generation parameters -
random- the source of randomness for this key generator - Throws:
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InvalidAlgorithmParameterException- ifparamsis inappropriate for this key generator
engineInit
protected abstract void engineInit(int keysize, SecureRandom random)Initializes this key generator for a certain keysize, using the given source of randomness.- Parameters:
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keysize- the keysize. This is an algorithm-specific metric, specified in number of bits. -
random- the source of randomness for this key generator - Throws:
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InvalidParameterException- if the keysize is wrong or not supported.
engineGenerateKey
protected abstract SecretKey engineGenerateKey()
Generates a secret key.- Returns:
- the new key
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